customers name on header

[100asa]

How can I add the customers name on header, only when he's logged in?
Thanks

[Ajeh]

When the customer logs in, two session variables are set that can probably help you out:

        $_SESSION['customer_first_name'] = $check_customer->fields['customers_firstname'];
        $_SESSION['customer_last_name'] = $check_customer->fields['customers_lastname'];